Symmetry options for retopologyEnforce topologically symmetrical results when retopologizing meshes.Efficient layer groupingOrganize Sculpt Layers and Paint Layers into layer groups, to more easily identify specific layers in complex scenes.Enhanced interoperability with Maya for PtexImport and export Ptex and multitile UV textures to and from Maya in a single step.What's new in Service Pack 1:- Autodesk Mudbox 2015 Service Pack 1 includes several important enhancements, and fixes to defects that were discovered since the Mudbox 2015 release.- This release also addresses further Heartbleed security vulnerabilities with an update to OpenSSL.